Unique to the 1973 Mercury Cougar and Ford Mustang with 351 engines. This is a two piece ducting that connects to the air cleaner snorkel with a flex tube. The grade B lower section will have a broken, or damaged metal tab from battery corrosion. Sold as a two piece set, Grade A will have undamaged mounting tabs. The Ford MPC specifies that this is only for the 351-2V and 351-CJ (351-4V) engines.
Replaces Ford part number D3ZF-9A624-A.